Ventilating system for reprocessing of nuclear fuel rods

Chemical apparatus and process disinfecting – deodorizing – preser – For deodorizing of – or chemical purification of – or...

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176 37, 250507, 2523011W, G21F 706, G21C 1942

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active

042773610

ABSTRACT:
In a nuclear facility such as a reprocessing plant for nuclear fuel rods, the central air cleaner discharging ventilating gas to the atmosphere must meet preselected standards not only as to the momentary concentration of radioactive components, but also as to total quantity per year. In order more satisfactorily to comply with such standards, reprocessing steps are conducted by remote control in a plurality of separate compartments. The air flow for each compartment is regulated so that the air inventory for each compartment has a slow turnover rate of more than a day but less than a year, which slow rate is conveniently designated as quasi-hermetic sealing. The air inventory in each such compartment is recirculated through a specialized processing unit adapted to cool and/or filter and/or otherwise process the gas. Stale air is withdrawn from such recirculating inventory and fresh air is injected (e.g. by the less than perfect sealing of a compartment) into such recirculating inventory so that the air turnover rate is more than a day but less than a year. The amount of air directed through the manifold and duct system from the reprocessing units to the central air cleaner is less than in reprocessing plants of conventional design.

REFERENCES:
Bruce, F. et al., "Operating Experience with Two Radiochemical Processing Pilot Plants", Proc. 2nd U.N. Int'l. Conf. on Peaceful Uses Atom. Energy, Geneva, 1958, pp. 49-72.
Stoller, S. M. et al., Reactor Handbook, vol. II: Fuel Reprocessing, Interscience Publishers, Inc., N.Y., 1961, pp. 473-475, 524-527.
Corns, H. et al., "The New Separation Plant Windscale: Design of Plant and Plant Control Methods", Proc. 3rd Int'l. Conf. on Peaceful Uses Atomic Energy, Geneva, 1964, pp. 233-240.

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